/* 侧边工具栏 */

.toolbar {
    position: fixed;
    bottom: 70px;
    right: 0;
    z-index: 99;
}

.toolbar a {
    position: relative;
    display: block;
    width: 82px;
    height: 90px;
    margin-top: -1px;
    color: #757575;
    background-color: #fff;
    border: 1px solid #fff;
    text-align: center;
}

.icon {
    position: relative;
    width: 30px;
    height: 30px;
    margin: 0 auto 8px;
    padding-top: 18px;
}

.icon img {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 30px;
    height: 30px;
    transition: opacity .3s;
}

.hover {
    opacity: 0;
}

.toolbar a:hover .hover {
    opacity: 1;
}

.toolbar {
    color: #757575;
}

.toolbar a:hover {
    color: orangered;
}

#totop {
    visibility: visible;
    opacity: 0;
    margin-top: 10px;
}